Method for Sealing Tempered Vacuum Glass and Tempered Vacuum Glass
A method for sealing the tempered vacuum glass comprises: first preparing metallized layer bonded with the glass plate on the edge surface of the tempered glass to be sealed by locally heating the metal slurry coating; then air-tightly sealing the edges of two glass plates by using the metal brazing technology, or air-tightly sealing the edges of two glass plates by air-tightly welding the metal sealing sheet between the metallized layers of two glass plates to be sealed. A tempered vacuum glass is also provided. The method makes the sealing part have firm connection, good air tightness and good thermal shock resistance. The sealing structure made of the metal sealing sheet is well compatible with the temperature deformation caused by the temperature difference between the internal and external glass plates of the vacuum glass.
1 . A method for sealing tempered vacuum glass, wherein the method comprises the following steps:
1) preparing metal paste coatings on the surfaces to be sealed on the edges of tempered glass plates;
2) locally heating the positions of the metal paste coatings to sinter the metal paste coatings into metallized layers bonded with the glass plates; and
3) directly air-tightly welding the mutually corresponding metallized layers on the two glass plates to be sealed by adopting a metal brazing process to realize air-tight sealing of the edges of the two glass plates.
2 . The method according to claim 1 , wherein the metal paste coatings are prepared on the surfaces of the glass plates in a manner of dip coating, spray coating, screen printing, manual coating or mechanical coating.
3 . The method according to claim 1 , wherein the local heating manner in the step 2) is laser heating, flame heating, electric current heating, induction heating or microwave heating.
4 . The method according to claim 1 , wherein when the step 3) is performed, a solder metal foil is placed between the corresponding metallized layers on the two glass plates, or a solder metal is pre-plated on the surface of at least one of metallized layers, and subsequent welding is completed by the metal brazing process.
5 . The method according to claim 4 , wherein the solder metal foil and the solder metal are made of tin alloy solder.
6 . The method according to claim 1 , wherein the metal brazing process is performed under the protection of an inert gas, or in an environment of H 2 gas or N 2 gas, or in a vacuum environment.
7 . The method according to claim 1 , wherein the brazing temperature of the metal brazing process is less than or equal to 350.
8 . A method for sealing tempered vacuum glass, characterized by comprising the following steps:
1) preparing metal paste coatings on the surfaces to be sealed on the edges of tempered glass plates;
2) locally heating the positions of the metal paste coatings to sinter the metal paste coatings into metallized layers bonded with the glass plates; and
3) welding a metal sealing sheet between the metallized layers of the two glass plates to be sealed to realize air-tight sealing of the edges of the two glass plates.
9 . The method according to claim 8 , wherein the metal sealing sheet consists of two metal sheets; when the edges of the two glass plates are air-tightly sealed, the two metal sheets are alternatively air-tightly welded with the metallized layers on the two glass plates to be sealed by a metal brazing process or an ultrasonic welding process, and the two metal sheets are air-tightly welded to realize air-tight sealing of the edges of the two glass plates.
10 . The method according to claim 9 , wherein after the two metal sheets are respectively led out of the connected glass plates, the two metal sheets are mutually air-tightly welded by the metal brazing process or the ultrasonic welding process or a melt welding process.
11 . The method according to claim 10 , wherein the two metal sheets are led out of the space between the two glass plates to be sealed, and the two metal sheets are respectively air-tightly welded with the metallized layers on the inner surfaces of the two glass plates to be sealed.
12 . The vacuum glass according to claim 10 , wherein one of the two metal sheets is led out of the space between the two glass plates to be sealed, the led-out metal sheet is air-tightly welded with the metallized layer on the inner surface of one glass plate, and the other metal sheet is air-tightly welded with the metallized layer on the outer surface of the other glass plate.
13 . The vacuum glass according to claim 10 , wherein the two metal sheets are respectively air-tightly welded with the metallized layers on the outer surfaces of the two glass plates to be sealed.
14 . The method according to claim 8 , wherein the metallized layers are prepared on the edges of the glass plates to be sealed; and the metal sealing sheet consists of a metal sheet, and the metal sheet is respectively air-tightly welded with the metallized layers on the two glass plates to be sealed by the metal brazing process or the ultrasonic welding process to realize air-tight sealing of the edges of the two glass plates.
15 . The method according to claim 14 , wherein an arc connecting section is arranged between two parts air-tightly welded with the metallized layers on the two glass plates to be sealed on the metal sheet.
16 . The method according to claim 8 , wherein the metal sealing sheet consists of a metal sheet with U-shaped section, and two side edges of the U-shaped metal sheet are respectively air-tightly welded with the metallized layers on the two glass plates to be sealed to realize air-tight sealing of the edges of the two glass plates.
17 . The method according to claim 16 , wherein the U-shaped metal sheet is positioned between the two glass plates to be sealed, and the side edges of the U-shaped metal sheet are air-tightly welded with the metallized layers by the metal brazing process.
18 . The method according to claim 16 , wherein the two side edges of the U-shaped metal sheet are positioned between the two glass plates to be sealed and air-tightly welded with the metallized layers by the metal brazing process, and the bottom of the U-shaped section of the metal sheet partially extends out of the two glass plates.
19 . The method according to claim 16 , wherein one side edge of the U-shaped metal sheet is positioned between the two glass plates to be sealed and air-tightly welded with the metallized layer on the inner surface of one glass plate by the metal brazing process or the ultrasonic welding process, and the other side edge of the metal sheet goes around the edge of the other glass plate and then is air-tightly welded with the metallized layer on the outer surface of the glass plate by the metal brazing process or the ultrasonic welding process.
20 . The method according to claim 16 , wherein the U-shaped metal sheet wraps the edges of the two glass plates to be sealed, and two side edges of the U-shaped metal sheet are respectively air-tightly welded with the metallized layers on the outer surfaces of the two glass plates by the metal brazing process or the ultrasonic welding process.
21 . Tempered vacuum glass comprises at least two or more tempered glass plates compounded mutually, wherein the rims of the vacuum glass are sealed by the sealing method according to claim 1 .